Moistening mechanism for duplicating machines



Feb. 1, 1944. 4 H JAGGER ET AL l 2,340,327

MOISTENING MECHANISM FOR DUPLICATING MACHINES I Filed Feb. 5 ,1942 3 Sheets-,Sheetv 1 ARJ H. JAGGER .ETAL 2,340,327

Feb. 1,1944.

MOIS'I'EIG MECHANISM FOR DUPL-ICA'ING MACHINES Filed Feb. 5, 1942 s sr1eet ;s11ee"y 2 Fleb. 1, 1944. l H JAGGER ET AL 2,340,327

MOISTENING MECHANISM FOR DUPLICATING MACHINES Filed Feb. 5, 1942 3 Sheets-Sheet 3 wilhelm FSC oenhard, v

stantially at the line I I indicate side frame 'of the machine connected rigidly together by manica rt.1,1944 i MorsTaNrNG nmcnamsuron nnnacamc. momes Hubert Jagger. Maywood, wilhelm F. schoen-- hardt, Chicago. and Albert F. Uhlig, Cicero,

-assignors to Ditto, Inco mutated. Chicago, lll

a corporation oi' West Virginia Application February 5, 1942, serial No. 429.5138

(c1. 11i-4s) 11 claims.

This invention relates to moistening mechanisms for duplicating machines, and it has for its object the provision of an improved form and arrangement of parts o! the type disclosed by the application of Stephen Kokay, Serial No. 403,355, filed July 21,1941. We do not claim as our invention any of the subject matter shown and described by said earlier application.

It is one o1' the objects of our invention to provide a greatly simplified and improvedy arrangement of parts by'which solvent is delivered to a rolleror other suitable means by which a thin even nlm of solventmay be applied to the face of a copy sheet. by which the return of any surplus solvent from the distributing and applying means is brought about by a pumping and siphon'- ing action after the completion of the passage of a copy sheet thereby, by which the desired flushing action istattainedfor cleaning the rollers or other distributing and applying means for preventing the collection of lint thereon, and by which'a suitable screening eiect is secured for separating out the lint which is picked up by the solvent so as to prevent clogging of` the mechanism. L

It is another object of our invention to provide an improved arrangement for the escape of air from the liquid entering the pump chamber so as to render the action of the pump more even and more positive with respect to the feed-of solvent to the moistening mechanism.

It is another oblect of our invention to improve mechanisms of this type in sundry details hereinafter pointed out. The preferred means by which the several objects have been attained are illustrated in the accompanying drawings, in which I Fig. 1 is a vertical sectional view through a duplicating machine embodying our improvements, being substantially a section taken at .the une l-l of Fig. 3: y

Fig. 2 is a vertical cross sectional view taken substantially at the line 2 2 of Fig. 3;

Fig. 3 is a vertical cross sectional view taken substantially at the 4line 3 3 of Fig. 1; I y Figs. 4 and 5 are horizontal `,sectional views taken substantially at the line 4 4 and the line 5 5, respectively, of Flg.,3r; and v Fig. 6 is a horizontal sectional view taken sub- 5-6 of Fig. 2.

Referring now to the several figures of the drawings, in which corresponding parts are indicated by the same reference characters, I0 and members at opposite sides crossbars I2 and I3, as is best shown in Fig.. 1. Between the standards I 3 and I. I we have mounteda. duplicating drum I4 `by means of a heavy shaft I5, such drum being provided with grippers I5 of any suitable type movablymounted thereon for securing the usual master sheet in position on the face of the drum so as to be carried around thereby. In the arrangement shown, the drum I4 is driven by a motor I1 by means of driving pulleys I 8, I9, 20 and 2i and cooperating endless belts 22 and 23, the pulley 2i being provided with a gear 24 which meshes with a gear 25 ixedly connected with the drum. The arrangement is such that the drum I4 is driven in counterclockwise direction in Fig. 1.

As is usual in this -type of machine, an impression roller 26 is provided in position for pressing against the ,face ofthe drum, such impression roller being rotatably mounted between arms 21 pivotally mounted at opposite sides of the machine soas to swing about an axis at 28. Each of the arms 21 is provided with a downwardly extending. arm 23, which arms engage bars 30 mounted at their rear ends upon eccentrics 3| carried by a' transverse shaft 32. At their forward` ends, the bars 30 are provided with coiled springs 33 which press the arms 29 yieldingly towardthe shaft 32. The arrangement is such that by rotary movement of the shaft 32 the yielding pressure of the impression roller 26 against the drum may be controlled.

A short distance to the rear of the impression roller 26, we haveprovided the usual forwarding rollers 34 and 35, the roller 34 being mounted upon a fixed axis, while the roller 35 is mounted by means of a shaft 36 between bell-crank levers 31 which are pivotally mounted upon the standards Ill and II at 33, the downwardly extending' armV portions ofthe levers 31 being adjustably connected with coiled' springs which normally hold the levers and the roller-35 upwardly in pressure relationship tothe roller 34. 'I'he roller 34 is driven in counterclockwise direction in Fig. 1 by means of a pinion "meshing with an idler pinion 4I which in turn is driven intermittently by a. mutilated gear "adapted to rotate with the drum, the arrangement being such that the roller 34 when driven moves at substantially the same surface speed as that of the drum.

A short distance tothe rear of the forwarding rollers 34 and 35, we have provided a table or tray. 43 in position for holding a pile 44-of copy sheets to be fed one at a time into the bite of the rollers 34 and 35 for movement forwardly Fig. 2. A short distance infront of the impression roller 26, we have provided a tra'y 45 in position to receive the copy sheets as they move forwardly toward the right in Fig. 1 from lthe impression roller 26.

The means for applying moisture to the forwarding roller 34 for transfer to the face of a copy sheet moving forwardly between the lrollers 34 and 35 comprises a spreader roller 46 which is rotatably mounted between arms 41 depending from sleeves 48 which are rotatably mounted upon the rounded end portions of a crossbar orshaft 49 which is mounted rigidly in position between the standards I and Il. 'I'he means for press- I Y a lever 66 pivotally mounted upon a horizontal axis at 61 as shown in Fig. `l, such lever 66`being connected with an extension arm 68 which is provided at its upper end with a roller 69 in position to engage-acam mounted so asto revolve with the drum I4. The arrangement is such ing the roller 46 forwardly against the roller 34 comprises lugs 5I carried by arms 52 pivotally mounted at 53 on brackets 54 mounted upon the standards lll and `II. pressed forwardly by coiled springs 55 bearing at their front ends on the lugs and bearing-at their rear ends on nuts 56 mounted by means of screwthreads on links 51 pivotally mounted on said brackets 54. 'I'he arrangement is such that the springs 55 serve effectively for pressing the spreader roller 46 against the forwarding roller 34, the degree of pressure being controlled by the adjusted position of the nuts 56. Itis believed to be unnecessary to describe this arrangement further in detail herein, since it is substantially The lugs 5| in turn are the same as the arrangement shown in said prior Kokay application 403,355.

In the arrangement shown, the upper forwarding roller 34 is preferably formed of rubber or neoprene having a Shore hardness'of about 45, the lower forwarding roller being formed of sponge rubber or neoprene. The roller 46 has a hardnessl comparable to that of brass, being considerably harder than the roller 34, and being preferably formed of "Roulene which is the trade name of a resin composition. The rollers 34 and 35 are substantially smooth on their surfaces, while thespreader roller 46 is provided with a series of ilne grooves' extending longitudinally of the roller, such grooves having pref- -erably e. depth of about .003 inch and being closely spaced. 'I'he arrangement is such that the rollers 34 and 46 cooperate to form a trough between them which is adapted to hold a supply of solvent such as isordinarily used in connection with liquid .process duplicating machines.

For preventing the solventdeliveredl into the trough between the rollers 34 and 46 from running of! at the ends'of the rollers, we have provided that upon each revolution of the drum the roller 69 is moved inwardly by the action of the spring when the low portion 1l of the cam` is brought into engagement with the roller 69 as thedrum rotates. When thereafter the outwardly trending face portion 12 of the cam 10 is brought into engagement with the ro1ler69, the rod 64 and plunger 63 are moved upwardly to the limit of their motion againstthe action of the spring 65.

At its lower end portion, below vthe tank 59, the cylinder 6| is provided with an opening in its side wall in which a combination nipple. and check-valve 13 is mounted, such nipple in turn being connected with a line of piping 14 which leads upwardlylfor connection with a pipe 15 mounted in position above the rollers 34 and 46.l A pipe 16 of increased size is mounted about the transversely extending portion of the `pipe 15 in centered position with respect thereto, as is clearly shown in Figs. 2 and 3, being supported in position by mounting blocks 16a' which are rigidly carried by the shaft 49. The pipe 16 is provided with openings 11 in its bottom face for spraying into the trough liquid delivered through the pipe 15, the pip'e 15 having openings 19 in its upper face portion for permitting the escape of the liquid to the interior of the pl'pe 16. The arrangement is such that upon each revolution of the drum I4 a measured quantity of liquid is delivered upwardly through the `Dining 14 and sprayed through the ,openings 11 into the trough between the rollers 34 and 46.

sprayed thereon. Above and about the bar 49 and the pipe 16, an inverted U-shaped housing 30 is mounted by means of a screw 8l, with a spacer 82 interposed between the member 80 and the bar 49, as is clearly shown inFig. 2. Im-

disks or washers 58 on theends of the rollers 34 of a size to overlap the ends of the roller 46. 'The washers 56 are preferably formed of metal and chromium plated so as to have a smooth and hard non-corrosive surface- The means for 'delivering solvent into the trough provided by the rollers 34 and 46 comprises a tank 59 located at a lower level than that of the rollers, such tank being closed by a nonsealing top plate 60. `Within the tank, we have provided a pump comprising a cylinder 6I which extends downwardly through the bottom wall of the tank, being provided with a plurality of openings 62 through its wall immediately above the bottom wall of the tank. Within the pump cylinder 6I a plunger 63 isslidably mounted, being connected with an operating rod 64, a coiled spring 65 being mounted between the plunger and the upper end of the cylinder for holding the plunger -normally in lowered position. The plunger 63 and rod 64 are movedl upwardly `against the action of the springv 65 by means of l.mediately in front of the spray pipe 1.6, a vertically disposed guard plate 83 is mounted in position, such plate being secured 'at its ends to the mounting blocks 16a. 'I'he arrangement'is such that the plates 19 and 83 and the housing member 8,0 prevent the splashing'of liquid as it is dehvered from the pipe 16 into the trough between -the rollers 34 and 46. Immediately in front of the spreader roller 46, a vertically positloned plate 36a is provided, depending from the shaft 49, having bracket means llllb secured thereto for supporting a guide plate e in upwardly spaced relation to the table 43.

Means is provided for taking the surplus liquid from the trough betweenthe rollers 34 and 46 .u pon each revolution of the drum so as substantially to-empty the trough at about the time When the copy sheet passes out of engagement with the forwarding roller 34. This means comprises a combination nipple and check-valve 84 mounted in an opening in the lower end portion f'the pump cylinder 6I opposite to the nipple 13. The nipple 84 diifers from the nipple 13 in that the check-valve opens in the `opposite direction. That is to say, the check-valve 19 permits movementor liquid from thev cylinder and through the nipple, while the check-valve 84 permits' the movement ofliquid through the nipple and intoV the cylinder. At its outer end portion, the nipple chine. The result is that there is a tendency for the solvent to ilow toward the ends of the roll- 84 is connected with a line of piping 85 which is provided a screen member 81 which is removably mounted in position, being held xedly in position by means of ascrew-threaded cap '98 by which the tight closure of the tank is effected. Another lead of piping 89 is connected with the interior ofthe tank 86 with its open end at the opposite face of the screen 81 from that at which the open end of the pipe 85 is located. Thel pipe 89 is connected at its upper end with a transversely positioned suction head 98 which is supported in position on the lower edge of the guard plate 88, as is clearly shown in Fig. 2. The suction head 90 is provided with a series of openings 9| in its bottom face in close proximity to the bottom of the trough between the rollers 34 and 46.

The arrangement of the pump 6| and its cooperating parts is such that upon a downward ers 94 and 46. The openings 9| in the -suction head 99 on the other handare arranged closer together at the ends of the suction head than at its intermediate portion, this arrangement serving to encourage the iiow of the liquid foward the ends of the rollers 84 and'45. `In the preferred arrangement, a substantial surplusof solvent delivered to the trough upon each downward stroke of the pump plunger 63 whereby a substantial amount of the solvent is caused to flow along the rollers `34 and 46. toward the ends of the rollers and an eiective ushing acmovement of the'plunger 63 by the spring 65 the liquid trapped in the lower end of the cylinderv 6I. is forced outwardly through the nipple 18 so as to be sprayed from the pipe 16 into the trough between the rollers 34` and 46. The arrangement is such that the full -force of the pump is applied for delivering the liquid to the trough, this result being attained by. reason of the i'act that the piping 14 connected with the pressure side of the pump through the nipple 13 is continuous and unbroken to its 'point of connection with the spray pipe 15. When thereafter the plunger 63 is moved upwardly against the action of the spring 65, a suction eil'ect is exerted upon vthe A piping 85, the air-tight tank 86, the piping 89 and the suction head 98 for taking from the trough the surplus liquid therein. For-this purpose the full suction effect of the pump is applied upon the ,head 90 by 4reason of the tact'that the line of piping connecting the suction side of .the pump through the nipple 84 with the suction head 9i!` through the air-ti-ght tank 96 is continuous and unbroken. 'I'heconstruction is such that the initial movement of the plunger 69 upwardly from the bottom of the cylinder 6lserves to start the movement of the liquid downwardly through the pipe 89. After the suction stroke of the pump is completed, the movement of the solvent through the pipe 89 continues by reason of a siphoning eiect, such iiow of the solvent back to the air-tight tank 86 continuing until the ow is broken by the admission of air through the openings 9|in the suction head. The arrangement is such that upon an' upward movement of the pump plunger 63 is a suction eiTect is exerted upon the vsuction head 90 through the air-'tight tank 86 whether or not there isa supply of solvent in said tank 86. As the 1110W of solvent into the tank 86 continues through the pipe 89, the level oi' the solvent rises in the tank 86 and the open upper end ofthe piping 85 until the pipel 85 acts as an overow means for returning the 'solvent to the pump and the tan`k 59.

As is best shown in Fig. 3, the openings 11 in the spray pipe 16 are arrangedcloser together at the middle portion of thepipe 16 so that. the

`able face portion tion is brought about, tending to clean the rollers and to carry any lint orother foreign matter out lof the trough with the stream of solvent iiowing back through the pipe 89. As such4 lint is delivered by the solvent tothe tank 86, such lint is Atrapped underneath prevented from flowing back through the pipe 85 to the pump and the tank 59. At suitable intervals, the` tank 96 can be opened up by the removal ci the cap 88, whereupon the tank and the screen can be very readily cleaned, the screen 81 being lifted out of position for a cleaning operation.'

As is shown in Figs. 2 and 6, the cylinder 6I is provided with a groove 92 in its outer face at one side communicating at its lower end with an opening 93 into the interior of the cylinder, a cover plate 94 being provided serving with the groove 92 and the opening. 93 to form' a duct leading upwardly from the interior of the cylinder at its lower en d portion and opening at the top of the tank 59 above the level of the solvent in the tank. By the provision of this duct, any air drawn into the cylinder 6| with the streams of solvent entering through' the openings 62 is afforded an avenue of escape to the atmosphere,.

- of the pump is mademore even and more positive so as to secure abetter control ment of the solvent by the pump.

of the move- While we preferv to employ the form and arrangement of parts as disclosed in the drawings and as abovedescribed, our invention is not to be limited to such arangement except Aso far as the claims may be so limited, it being understood that changes might well be made in the construction without departing from the spirit of oui` invention.

' We claim:

1. In aV mechanism for moistening copy sheets in a liquid process duplicating machine, the combination of a member having a downwardly movand a member cooperating trough between them adaptof liquid and adapted upon of said face portion to pass therewith to form a. ed tohold a supply downward movement a thineven iilm of liquid on said face. portion i movable member for solvent is delivered to the trough between the' I ro1lers34 Vand 48gmore rapidly at the middle of the machine than" at opposite sides oi' the mavfor delivering liquid to said trough below the trough, means .cooperating with said carrying la copy sheet forwardly lin engagement therewith for taking moisture therefrom, a pump,v means for actuating said pump in timed relationvto the movement of copy `sheets Apast said` moistening means, and means ladapted by connection with the pressure side of said pump to apply the full pressure of the pump and .adapted of the pump by connection with the suction side toapply the full suction eifect of the the screen 81 and is downward movement of said face portion to pass a. thin' even lm of liquid on said face portion below the trough, means cooperating with said movable member for carrying a copy sheet forwardly in engagement therewith for taking moisture therefrom, a pump, means for actuating said pump in timed relation to themovement of copy sheets-past said moistening means, and means connected with said pump adapted on a pressure stroke of the pump to vapply the full pressure of the pump for delivering liquid to saidtrough and adapted on a suction stroke of the pump to apply the full suction effect of the pump on the liquid in said trough for taking the major portion of said liquid from the trough at about the end 0f the duplicating operation on each copy sheet in turn.

- eatin-g with said pump adapted to permit liquid to vescape from the pump only through the outlet valve and to permit liquid to enter the pump i 3. In a mechanism for moistening copy sheets in a liquid process duplicating machine, the combination of a. member having a downwardly movable face portion and a member cooperating therewith to form a trough between them adapted to hold 'a supply of liquid andadapted. upon downward movement of said face portion to pass a thin even lm of liquid on saidface portion below the trough, means cooperating with said movable member for carrying a copy sheet forwardly in engagement therewith for taking moisiure therefrom, a pump, means for actuating said pumpin timed relation to the movement of copy sheets past said moistening means, and` means adapted by connection with the pressure side of .said pump to deliver liquid to said trough and adapted byconnection with the suction side of the pump to apply the full suction effect of the pump on the liquid in said-trough for taking the major portion of the liquid from the trough at about the end of the duplicating operation on each copy sheet in turn.

4. In a mechanism for moistening copy sheets in a liquid process duplicating machine, the combination of a member having a downwardly movable face portion and a member cooperating v therewith to form a trough between-them adapted to hold a supply of liquid and adapted upon downward movement of said face portion to pass a thin even film of liquid on said face portion below the trough, means cooperating with said Y movable member for carrying a copy sheet Iorwardly in engagement therewith for taking moisture therefrom, a pump, means for actuating said pump in timed relation to the movement of copy sheets ,past said moistening means, means adapted by connection with the pressure side o! said pump to deliver liquid to said trough, a suction` head in said trough open at a plurality of points therealong in close proximity to the bottom of the trough, and connections between said suction head and the suction side of said pump adapted to apply the full suction effect of the pump on said head for taking the major portion of the liquid from the trough at about the lend of the duplicating operation on each copy sheet in turn.

4 2,340,827 liquid in said trough for taking the major poreven lm of liquid on said face portion below the trough, means cooperating with said movable member for carrying a copy sheet forwardly in engagement therewith for taking moisture therefrom, a tank adapted to hold a supply of liquid at a lower level than that of said trough, a pump for taking liquid from said tank, means for actuating said pump in timed relation to the movement of copy sheets past said liquid applying means, valvedinlet and' outlet nipples communionly through the inlet valve, an unbroken line of piping connected with said outlet nipple for applying the full pressure of the pump for delivering liquid to said trough, and means comprising an unbroken line of piping connected with said inlet nipple for applying the full suction eiect of the pump on the liquid in said trough fortaking the major portion of said liquid from the trough at about the end of the duplicating operation on each copy sheet in turn.

6. In a mechanism for moi'stening copy sheets in a liquid process duplicating machine, the combination of a member having a downwardly movable face portion and a member'cooperating therewith to form a .trough between them adapted to hold a supply of liquid and adapted upon downward movement of said face portion to pass a thin even lm of liquid on said face portion below the trough, meanscooperating with said movablemember flor carrying a copy sheet fortank at a substantial distance above the lower end of the cylinder, a plunger movable vertically invsaid cylinder so as to move liquid ahead of it in either direction, means for actuating said plunger in timed relation to the movement of copy sheets past said liquid applying means, valved inlet and outlet nipples communicating with the cylinder below the tank adapted to prevent liquid 'from entering the cylinder through the outlet nipple and to prevent liquid from escaping from. the cylinder through the inlet nipple, an yunbroken line of piping connected with said outlet nipple for applying the full pressure of the pump fordelivering liquid to said trough, and means comprising an unbroken line of piping connected with said inlet nipple for applying the full suction effect of the pump on the liquid in said trough for taking the major portion of said liquid from the trough at about the end ofthe duplicating operation on each copy sheet in turn.

- '7. In a mechanism for moistening copy sheets in a liquid process duplicating machine, the combination of a member having a downwardly movable face portion and' a member cooperating therewith to Iform a' trough between them adapted to hold a supply of liquid and adapted upon down ward movement of said face portion to pass a thin even lm of liquid on said face portion below the trough, means cooperating with said mov- 5. lara mechanism for moistening copy sheets in engagement therewith for taking moisture 2,340,327 therefrom, a ltank adapted to hold a supply of liquid at a lower level than that of said trough, a pump for taking liquid from said tank, air vent means for permitting air to escape from the liquid in said pump, and means adapted by connection with the pressure side of said pump to deliver liquid to said trough and adapted by connection with the suction side of the pump for taking the major portion of the liquid from the trough at about the end of the duplicating operation on each copy sheetin turn.

8. In a mechanism for moistening copy sheets in a liquid process duplicating machine, the combination of a member having a downwardly movable face portion and a member cooperating therewith to form a trough between them adapted to hold a supply of liquid and adapted upon downward movement of said face portion to pass a thin even iilm of liquid on said face portion below the trough, means cooperating with said movable member for carrying a copy sheet forwardly in engagement therewith for taking moisture therefrom, a tank ,adapted to hold a supply of liquid at a lower level than that of said trough, a pump for taking liquid from said .tank

and comprising a cylinder in vertical position in the tank with an air vent connected with the lower end'portion of the cylinder and opening above' the surface of the liquid in the tank for permitting air to escape from the liquid in said pump, and means adapted by connection with the pressure side of said pump to deliver liquid to said trough and adapted by connection with the suction side of the pump for taking the major` portion of the liquid from the trough at about the end of the duplicating operation on each copy sheet in turn.

9. Ina mechanism for moistening copy sheets in a liquid process duplicating machine, the combination of a member having a downwardly movable face portion and a member cooperating therewith to form a trough between them adapted to hold a supply of liquid and adapted upon downward movement of said face portion to pass a thin even film of liquid on said face portion below the trough, means cooperating with said movable member for carrying a copy sheetforwardly in engagement therewith for taking moisture therefrom, a pump, means for actuating said pump in timed relation to the vmovement of copy sheets past said moistening means, means adapted by connection with the pressure side of said pump `to deliver liquid to said trough, an air-tight tank, a suction head in said trough in position to draw liquid therefrom,

v a pipe opening into said air-tight tank and connected with said suction head, another pipe opening into said air-tight tank and connected with the suction side of said pump, and a screen extending across said air-tight tank between the open ends of said two pipes so as to prevent lint of said covermember thereon,

from being carried froml and removably mounted capable of being cleaned readily.

10. In a mechanism for moistening copy sheets in a liquid process duplicating machine, the combination of a member having a downwardly movable face portion and a member cooperating therewith to form a trough between them adapted to' hold a supply of liquid and adapted upon downward movement of to pass a thin even lm of liquid onsaid face portion below the trough, means cooperating with said movable member for carrying a copy sheet forwardly in engagement therewith for taking moisture therefrom, a pump, means for actuating said pump in timed relation to the movement of copy sheets past said moistening means, means adapted by connection with the pressure side of said pump to deliver liquid to said trough, an air-tight tank comprising a cover member removably secured in position, a screen removably held in position across said tank bythe pressure a suction head in said trough in position to draw liquid from the trough, a pipe connected with the suction side of said pump and opening into said air-tight tank at one face of said screen, and another pipe'connected with said suction head and opening into said tank at the opposite face of said screen.

11. In a mechanism for moistening copy sheets in a liquid process duplicating machine, the combination of a member having a downwardly movable face portion and/ a member cooperating therewith. to form a trough between them adapted to hold a supply of liquid and adapted upon downward movement of said face portion to pass a .thin even film of liquid on said face portion below the trough, means cooperating with said movable member for carrying a copy sheet forwardly in engagement therewith for taking moisture therefrom, a pump, means for actuating said pump in timed relation to the movement of copy sheets past said moistening means, means adapted by connection with the pressure side of said pump to deliver liquid to said trough, an air-tight tank comprising a cover member removably secured in position, a screen removably held in position across said tank by the pressure of said member thereon, a suction head in said trough in position to draw liquid from the trough, a pipe connected with the suction side of said pump and extending into said air-tight tank through the cover member and opening above said screen, and another pipe connected with said suction head and extending into said tank through the cover member and throughthe screen so as to open in the tank below the screen.

HUBERT JAGGER. WHJHELM F.- SCHOENHARDT. ALBERT'RUHIIG.

saidhe'ad to said pump in position so as to be said face portion 

